The best way to fight against the bishop pair is to try to exchange one of the bishops. Sarana, naturally refuses it, but the bishop on c2 gives Black some extra tactical chances.
14. d4c5  14... c7c5 White has sacrificed a pawn, but it's clear there's good compensation with both bishops pointing at Black's king. 15. c1f4 A new move and not the most accurate. 15... c5b6  16. f3e5 The bishop is a little less menacing on f4, but of course, Black has to be careful.